Hacking just about any binary version of the game would probably be just about as difficult as hacking the MAME ROMs. Altering source code would be considerably simpler, as Mr. Seihen suggests.
...It occurs to me that you don't really
need to jump to the "They Meet" sequence in the game itself, because really you're just going to run the slide show afterwards, right? So you could just as easily use some kind of screen recording software to make an AVI (or whatever) movie of the sequence in question.
That means you're really only left with two problems: changing the graphic, and setting up something in an emulator that will spontaneously jump to a media player as soon as the fruit is collected.
It occurs to me that a fairly trivial way to alter the ring graphic would be to use RAINE. I haven't tried it myself, but RAINE supports something called "EmuDX" that lets you replace the graphics with whatever you want, presumably in a fashion that would be easier than fishing around in the ROM.http://rainemu.swishparty.co.uk/html/download/extras.htmlSomeone was saying the other day
that an Android release is imminent, so the code might not be as dead as it looks.
As for the fruit, what if you looked for a program that could recognize the fruit-collection sound effect and act accordingly? It's a fairly distinctive sound. Then you wouldn't have to dig around inside game code or emulator code at all. It's spectacularly kludgy, but it might work. If EmuDX loads the sound effect from a specific file, then you might even be able to get away with somehow monitoring accesses of that file.